A defect-resistant Co-Ni superalloy for 3D printing
| Autor: | Chris J. Torbet, Sean P. Murray, Andrew T. Polonsky, Michael M. Kirka, Ning Zhou, Tresa M. Pollock, Gareth G.E. Seward, Ryan R. Dehoff, Kira Pusch, Stephane A. J. Forsik, Peeyush Nandwana, William E Slye |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Science Alloy General Physics and Astronomy 3D printing Design elements and principles Mechanical properties 02 engineering and technology engineering.material 01 natural sciences Characterization and analytical techniques General Biochemistry Genetics and Molecular Biology Article 0103 physical sciences Ultimate tensile strength Selective laser melting lcsh:Science 010302 applied physics Multidisciplinary business.industry Metallurgy General Chemistry Metals and alloys 021001 nanoscience & nanotechnology Superalloy Cathode ray engineering lcsh:Q 0210 nano-technology business Material properties |
| Zdroj: | Nature Communications Nature Communications, Vol 11, Iss 1, Pp 1-11 (2020) |
| ISSN: | 2041-1723 |
| Popis: | Additive manufacturing promises a major transformation of the production of high economic value metallic materials, enabling innovative, geometrically complex designs with minimal material waste. The overarching challenge is to design alloys that are compatible with the unique additive processing conditions while maintaining material properties sufficient for the challenging environments encountered in energy, space, and nuclear applications. Here we describe a class of high strength, defect-resistant 3D printable superalloys containing approximately equal parts of Co and Ni along with Al, Cr, Ta and W that possess strengths in excess of 1.1 GPa in as-printed and post-processed forms and tensile ductilities of greater than 13% at room temperature. These alloys are amenable to crack-free 3D printing via electron beam melting (EBM) with preheat as well as selective laser melting (SLM) with limited preheat. Alloy design principles are described along with the structure and properties of EBM and SLM CoNi-base materials. Additive manufacturing promises a major transformation of the production of high economic value metallic materials. Here, the authors describe a new class of 3D printable superalloys that are amenable to crack-free 3D printing via electron beam melting as well as selective laser melting. |
| Databáze: | OpenAIRE |
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